摘要
为研究不同冻融环境下轻质发泡混凝土的抗冻性能,将该轻质发泡混凝土分别在空气、水溶液、NaCl溶液三种不同介域环境下进行冻融循环试验,分析三种不同介域环境条件下这种轻质发泡混凝土冻融循环后的质量损失和抗压强度损失。研究表明:该种轻质发泡混凝土在空气冻融循环后,质量减小,抗压强度减小;在水溶液和NaCl溶液冻融循环后,质量增大,抗压强度减小。对三种不同介域环境条件下轻质发泡混凝土冻融循环后的表观和微观进行观察,并运用XRD进行分析。观察分析表明:轻质发泡混凝土在空气冻融循环和水溶液冻融循环后,没有明显生成物析出;在NaCl溶液冻融循环后有Na2SO4晶体析出,这种“晶体”为物理反应所产生。以上研究为今后轻质发泡混凝土在冻融环境条件下使用提供了理论依据。
To study the anti-frost property of a type of foamed lightweight concrete in different freezing-thawing conditions,the freeze-thaw cycle experiment was conducted on the foamed lightweight concrete in three different conditions: air,aqueous solution and NaCl solution. The purpose was to analyze the loss of mass and compressive strength of the foamed lightweight concrete after freeze-thaw cycle. Research indicates: after the freeze-thaw cycle in the air,mass and compressive strength of the foamed lightweight concrete both decrease. After the freeze-thaw cycle in aqueous solution and NaCl solution,the mass increases while compressive strength decreases. Observation and XRD analysis are also carried out on the manifestations and microcosmic structures of the foamed lightweight concrete after the freeze-thaw cycle in three different conditions. Analysis indicates: foamed lightweight concrete doesn’t separate out obvious product after freeze-thaw cycle in the air and aqueous solution. In contrast,after the freezing and thawing cycle of NaCl solution Na 2SO 4 crystal is precipitated,which is generated by physical reaction. This analysis provides theoretical basis for the utilization of the foamed lightweight concrete in freezing-thawing conditions.
作者
郝煜
史勇
王涛
侯永利
HAO Yu;SHI Yong;WANG Tao;HOU Yong-li(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;The Inner Mongolia Autonomous Region Key Laboratory of Civil Engineering and Mechanics,Hohhot 010051,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第5期1456-1461,共6页
Bulletin of the Chinese Ceramic Society
基金
内蒙古工业大学大学生创新实验计划项目(2017064)
内蒙古工业大学大学生科技创新基金2017年项目
关键词
轻质发泡混凝土
冻融
质量损失与抗压强度损失
表观与微观形貌
侵蚀机理
foamed lightweight concrete
freeze thawing
mass loss and compressive strength loss
apparent and microscopic analysis
erosion mechanism
